const school = {
    name: '尚硅谷'
}
const cities = {
    xiaoqu: ['北京','上海','深圳']
}
// 设置给 school 原型对象加上 cities
Object.setPrototypeOf(school, cities);
// 获取 school 的原型对象
console.log(Object.getPrototypeOf(school));
console.log(school);